Lesson 1 ImageDataBunch error

I’m getting a warning followed by an error in the lesson 1 notebook.

data = ImageDataBunch.from_name_re(path_img, fnames, pat, ds_tfms=get_transforms(), size=224, bs=bs).normalize(imagenet_stats)
C:\Users\bjos\Anaconda3\envs\fastaienv\lib\site-packages\fastai\basic_data.py:201: UserWarning: There seems to be something wrong with your dataset, can’t access self.train_ds[i] for all i in [3360, 3103, 1446, 5255, 5889, 5911, 4626, 2280, 2499, 4337, 4413, 469, 4868, 1083, 2383, 3778, 3807, 2653, 5682, 1580, 1850, 1832, 2191, 4227, 1288, 1070, 5860, 4452, 759, 4139, 2078, 400, 4918, 4152, 3455, 1185, 2932, 4980, 615, 3366, 5594, 4216, 1253, 957, 2869, 5022, 4961, 641, 5189, 3816, 5687, 4253, 2354, 1847, 13, 3042, 5216, 2481, 3380, 5236, 4511, 2625, 1175, 634]
warn(f"There seems to be something wrong with your dataset, can’t access self.train_ds[i] for all i in {idx}")

I’m running the notebooks locally on Windows 10.